36709-10-1Relevant articles and documents
Is the reaction between CH3C(O)O2 and NO3 important in the night-time troposphere?
Canosa-Mas, Carlos E.,King, Martin D.,Lopez, Reyes,Percival, Carl J.,Wayne, Richard P.,Shallcross, Dudley E.,Pyle, John A.,Daele, Veronique
, p. 2211 - 2222 (1996)
A discharge-flow system equipped with a laser-induced fluorescence (LIF) cell to detect NO2 and a multi-pass absorption cell to detect NO3 has been used to study the reaction CH3C(O)O2 + NO3 → CH3C(O)O + NO2 + O2 (1) at T = 403-443 K and P = 2-2.4 Torr. The rate constant was found to be independent of temperature with a value of k1 = (4 ± 1) × 10-12 cm3 molecule-1 s-1. The likely mechanism for the reaction is discussed. The atmospheric implications of reaction (1) are investigated using a range of models and several case studies are presented, comparing model results with actual field measurements. It is concluded that reaction (1) participates in a cycle which can generate OH at night. This reaction cycle (see text) can operate throughout the continental boundary layer, but may even occur in remote regions.
Reactions of Peroxyacetyl Radicals with Reduced Sulfur Compounds
Mineshos, Gerassimos,Glavas, Sotirios,Schurath, Ulrich
, p. 501 - 508 (1992)
The reaction of peroxyacetyl radicals with reduced sulfur compounds was studied at 55 deg C in N2 at 1000 mbar total pressure.The radicals were generated in equilibrium with peroxyacetyl nitrate and NO2 in large excess.The pseudo first order decay of PAN was measured in the absence and presence of several 100 ppm CH3SH, C2H5SH, n-C4H9SH, (CH3)2S and (CH3s)2.Computer simulations yielded the following rate constants of peroxyacetyl radicals with the above mentioned sulfur compounds: 3.7, 2.8, 13.0, 0.9, and 1.8*10-16 cm3/s, respectively.An electron capturing compound of the thiols with NO2 was observed.Keywords.Reactions; PAN; Sulfur compounds.
Absorption Spectrum and Kinetics of Reactions of the Acetylperoxy Radical
Moortgat, G.,Veyret, B.,Lesclaux, R.
, p. 2362 - 2368 (1989)
The ultraviolet absorption spectrum of the acetylperoxy radical was measured in the range 190-280 nm.The radical was generated by flash photolysis of Cl2/CH3CHO/O2 mixtures.The absorption spectrum was calibrated against the HO2 radical generated in the Cl
Absolute and relative rate constants for the reactions CH3C(O)O2 + NO and CH3C(O)O2 + NO2 and thermal stability of CH3C(O)O2NO2
Sehested, Jens,Christensen, Lene Krogh,M?gelberg, Trine,Nielsen, Ole J.,Wallington, Timothy J.,Guschin, Andrei,Orlando, John J.,Tyndall, Geoffrey S.
, p. 1779 - 1789 (2007/10/03)
A pulse-radiolysis system was used to measure absolute rate constants for the reactions of CH3C(O)O2 radicals with NO and NO2 at 295 K and 1000 mbar total pressure of SF6. When the rate of formation and decay of NO2 using its absorption at 400.5 and 452 nm were monitored, the rate constants k(CH3C(O)O2 + NO) = (2.0 ± 0.3) × 10-11 and k(CH3C(O)O2 + NO2) = (1.0 ± 0.2) × 10-11 cm3 molecule-1 s-1 were determined. Long path-length Fourier transform infrared spectrometers were used to study the rate-constant ratio k(CH3C-(O)O2 + NO)/k(CH3C(O)O2 + NO2) in 6-700 Torr total pressure of N2 diluent at 243-295 K. At 295 K in 700 Torr of N2 diluent k(CH3C(O)O2 + NO)/k(CH3C(O)O2 + NO2) = 2.07 ± 0.21. The results are discussed in the context of the atmospheric chemistry of acetylperoxy radicals.
